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Terminal lag on Mac

User uploaded fileHello, hope someone can help me about this weird lag on terminal.

After I upgraded my machine's OS to High Sierra smth happened to terminal. When I open it up , weirdly its background is red while I've set it up to gray and in preferences it is shown background is gray. And also it cause a lagging in whole machine , after closing terminal everything turn out to be okay.

MacBook Pro with Retina display

Posted on Dec 9, 2017 6:58 AM

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Question marked as Top-ranking reply

Posted on Dec 9, 2017 8:07 AM

Might be a corrupt .plist.


Do a backup, preferably 2 backups on 2 separate drives.


Quit the application.


Go to Finder and select your user/home folder. With that Finder window as the front window, either select Finder/View/Show View options or go command - J. When the View options opens, check ’Show Library Folder’. That should make your user library folder visible in your user/home folder. Select Library. Then go to Preferences/com.apple.Terminal.plist. Move the .plist to your desktop.


Restart the computer, open the application, and test. If it works okay, delete the plist from the desktop.


If the application is the same, return the .plist to where you got it from, overwriting the newer one.


Thanks to leonie for some information contained in this.

3 replies
Question marked as Top-ranking reply

Dec 9, 2017 8:07 AM in response to Akberovr

Might be a corrupt .plist.


Do a backup, preferably 2 backups on 2 separate drives.


Quit the application.


Go to Finder and select your user/home folder. With that Finder window as the front window, either select Finder/View/Show View options or go command - J. When the View options opens, check ’Show Library Folder’. That should make your user library folder visible in your user/home folder. Select Library. Then go to Preferences/com.apple.Terminal.plist. Move the .plist to your desktop.


Restart the computer, open the application, and test. If it works okay, delete the plist from the desktop.


If the application is the same, return the .plist to where you got it from, overwriting the newer one.


Thanks to leonie for some information contained in this.

Dec 9, 2017 7:58 AM in response to Akberovr

WOW, terminal is usually always reliable and no issues.

But I do feel your pain, sometimes it's the fix of simply turning on or off or over a setting and back again. I don't remember if it was the first last update or after the adjustment but in this session I had my terminal go from black to white.... ANYHOO

User uploaded file

Open Terminal,

User uploaded file Click the top & go to Preferences

User uploaded file

Reset the default or change it to something/anything, then CLOSE terminal and open it back and see - you can adjust your colors from there and such...

Terminal lag on Mac

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